Get Query String variable

GetQueryStringVariable

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]; 
} 
} 
}