[snippet] get parameter

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function(name)   

            {  

                    var
query=location.search.substring(1); 

                    var
pairs=query.split("&");  

                    for(var
i=0;i<pairs.length;i++)  

                    {   var
pos=pairs[i].indexOf(‘=‘); 

                            if(pos==-1)   continue;  

                            if(name==pairs[i].substring(0,pos)) {value=pairs[i].substring(pos+1); return
value;}

                    }return
undefined;

            }