function scan_agent_for_mobile_device()
{
	var agent = window.navigator.userAgent;
	var sub_agent = agent.substr(0,4).toLowerCase();
	var sub_agent_array = ['1207','3gso','4thp','501i','502i','503i','504i','505i','506i','6310','6590','770s','802s','a wa','acer','acs-','airn',
	                   	   'airn','alav','asus','attw','au-m','aur ','aus ','abac','acoo','aiko','alco','alca','amoi','anex','anny','anyw','aptu','arch','argo',
	                   	   'bell','bird','bw-n','bw-u','beck','benq','bilb','blac','c55/','cdm-','chtm','capi','cond','craw','dall','dbte','dc-s','dica','ds-d',
	                   	   'ds12','dait','devi','dmob','doco','dopo','el49','erk0','esl8','ez40','ez60','ez70','ezos','ezze','elai','emul','eric','ezwa','fake',
	                   	   'fly-','fly_','g-mo','g1 u','g560','gf-5','grun','gene','go.w','good','grad','hcit','hd-m','hd-p','hd-t','hei-','hp i','hpip','hs-c',
	                   	   'htc ','htc-','htca','htcg','htcp','htcs','htct','htc_','haie','hita','huaw','hutc','i-20','i-go','i-ma','i230','iac','iac-','iac/',
	                   	   'ig01','im1k','inno','iris','jata','java','kddi','kgt','kgt/','kpt ','kwc-','klon','lexi','lg g','lg-a','lg-b','lg-c','lg-d','lg-f',
	                   	   'lg-g','lg-k','lg-l','lg-m','lg-o','lg-p','lg-s','lg-t','lg-u','lg-w','lg/k','lg/l','lg/u','lg50','lg54','lge-','lge/','lynx','leno',
	                   	   'm1-w','m3ga','m50/','maui','mc01','mc21','mcca','medi','meri','mio8','mioa','mo01','mo02','mode','modo','mot ','mot-','mt50','mtp1',
	                   	   'mtv ','mate','maxo','merc','mits','mobi','motv','mozz','n100','n101','n102','n202','n203','n300','n302','n500','n502','n505','n700',
	                   	   'n701','n710','nec-','nem-','newg','neon','netf','noki','nzph','o2 x','o2-x','opwv','owg1','opti','oran','p800','pand','pg-1','pg-2',
	                   	   'pg-3','pg-6','pg-8','pg-c','pg13','phil','pn-2','pt-g','palm','pana','pire','pock','pose','psio','qa-a','qc-2','qc-3','qc-5','qc-7',
	                   	   'qc07','qc12','qc21','qc32','qc60','qci-','qwap','qtek','r380','r600','raks','rim9','rove','s55/','sage','sams','sc01','sch-','scp-',
	                   	   'sdk/','se47','sec-','sec0','sec1','semc','sgh-','shar','sie-','sk-0','sl45','slid','smb3','smt5','sp01','sph-','spv ','spv-','sy01',
	                   	   'samm','sany','sava','scoo','send','siem','smar','smit','soft','sony','t-mo','t218','t250','t600','t610','t618','tcl-','tdg-','telm',
	                   	   'tim-','ts70','tsm-','tsm3','tsm5','tx-9','tagt','talk','teli','topl','hiba','up.b','upg1','utst','v400','v750','veri','vk-v','vk40',
	                   	   'vk50','vk52','vk53','vm40','vx98','virg','vite','voda','vulc','w3c ','w3c-','wapj','wapp','wapu','wapm','wig ','wapi','wapr','wapv',
	                   	   'wapy','wapa','waps','wapt','winc','winw','wonu','x700','xda2','xdag','yas-','your','zte-','zeto','acs-','alav','alca','amoi','aste',
	                   	   'audi','avan','benq','bird','blac','blaz','brew','brvw','bumb','ccwa','cell','cldc','cmd-','dang','doco','eml2','eric','fetc','hipt',
	                   	   'http','ibro','idea','ikom','inno','ipaq','jbro','jemu','java','jigs','kddi','keji','kyoc','kyok','leno','lg-c','lg-d','lg-g','lge-',
	                   	   'libw','m-cr','maui','maxo','midp','mits','mmef','mobi','mot-','moto','mwbp','mywa','nec-','newt','nok6','noki','o2im','opwv','palm',
	                   	   'pana','pant','pdxg','phil','play','pluc','port','prox','qtek','qwap','rozo','sage','sama','sams','sany','sch-','sec-','send','seri',
	                   	   'sgh-','shar','sie-','siem','smal','smar','sony','sph-','symb','t-mo','teli','tim-','tosh','treo','tsm-','upg1','upsi','vk-v','voda',
	                   	   'vx52','vx53','vx60','vx61','vx70','vx80','vx81','vx83','vx85','wap-','wapa','wapi','wapp','wapr','webc','whit','winw','wmlb','xda-'];	

	for(var i in sub_agent_array)
	{
		if(i == sub_agent)
		{
			return true;	
		}
	}

	return false;
}

function is_mobile_device()
{
	var agent = window.navigator.userAgent;
	
	if( agent.match(/ipad/i) || (agent.match(/ipod/i)||agent.match(/iphone/i)) || (agent.match(/android/i)) || (agent.match(/opera mini/i))
	|| (agent.match(/blackberry/i))
	|| (agent.match(/(pre\/|palm os|palm|hiptop|avantgo|plucker|xiino|blazer|elaine)/i))
	|| (agent.match(/(iris|3g_t|windows ce|opera mobi|windows ce; smartphone;|windows ce; iemobile)/i))
	|| (agent.match(/(mini 9.5|vx1000|lge |m800|e860|u940|ux840|compal|wireless| mobi|ahong|lg380|lgku|lgu900|lg210|lg47|lg920|lg840|lg370|sam-r|mg50|s55|g83|t66|vx400|mk99|d615|d763|el370|sl900|mp500|samu3|samu4|vx10|xda_|samu5|samu6|samu7|samu9|a615|b832|m881|s920|n210|s700|c-810|_h797|mob-x|sk16d|848b|mowser|s580|r800|471x|v120|rim8|c500foma:|160x|x160|480x|x640|t503|w839|i250|sprint|w398samr810|m5252|c7100|mt126|x225|s5330|s820|htil-g1|fly v71|s302|-x113|novarra|k610i|-three|8325rc|8352rc|sanyo|vx54|c888|nx250|n120|mtk |c5588|s710|t880|c5005|i;458x|p404i|s210|c5100|teleca|s940|c500|s590|foma|samsu|vx8|vx9|a1000|_mms|myx|a700|gu1100|bc831|e300|ems100|me701|me702m-three|sd588|s800|8325rc|ac831|mw200|brew |d88|htc\/|htc_touch|355x|m50|km100|d736|p-9521|telco|sl74|ktouch|m4u\/|me702|8325rc|kddi|phone|lg |sonyericsson|samsung|240x|x320|vx10|nokia|sony cmd|motorola|up.browser|up.link|mmp|symbian|smartphone|midp|wap|vodafone|o2|pocket|kindle|mobile|psp|treo)/i))
	|| scan_agent_for_mobile_device() )
	{
		return true;
	}

	return false;
}