function getQueryVariable(variable) {  
var query = window.location.search.substring(1);  
var vars = query.split("&");  
	for (var i=0;i<vars.length;i++) {    
		var pair = vars[i].split("=");    
		if (pair[0] == variable) {      
			return pair[1];    
		}  
	} 
}