JS修改地址栏参数实例代码

function changeURLPar(destiny, par, par_value) 
{ 
var pattern = par+'=([^&]*)'; 
var replaceText = par+'='+par_value; 
if (destiny.match(pattern)) 
{ 
var tmp = '/\\'+par+'=[^&]*/'; 
tmp = destiny.replace(eval_r(tmp), replaceText); 
return (tmp); 
} 
else 
{ 
if (destiny.match('[\?]')) 
{ 
return destiny+'&'+ replaceText; 
} 
else 
{ 
return destiny+'?1=1&'+replaceText; 
} 
} 
return destiny+'\n'+par+'\n'+par_value; 
}