javascript 为select标签设置默认值

function selectedValue(){
//var jcitems = '<ws:property value="jcjieguo.jcitems"/>';
//var jcvalues = '<ws:property value="jcjieguo.jcvalues"/>';

//var jcitemsArray = jcitems.split(',');
//var jcvaluesArray = jcvalues.split(',');
//alert(jcitemsArray.length+":"+jcvaluesArray.length);
//if(jcitemsArray.length > 0&& jcvaluesArray.length > 0){
//for(var i = 0 ;i < jcitemsArray.length;i++){
//alert(jcitemsArray[i]+":"+jcvaluesArray[i]);
//var ridaoObjects=document.getElementsByName(jcitemsArray[i]);
        //for(var j=0;j<ridaoObjects.length;j++){
            //if(jcvaluesArray[i]==ridaoObjects[j].value){
            //ridaoObjects[j].checked=true;
            //}
        //}


//}
//}
var selects = document.getElementById("formSearch").getElementsByTagName("select");
var options;
//alert(selects.length);
for(i=0;i<selects.length;i++){
options = selects[i].options;
//alert(options.length);
for(j=0;j<options.length;j++){
//alert("selects[i].value="+selects[i].value +"   "+ "options[j].value" + options[j].value);
if(selects[i].value == options[j].value){
options[j].selected=true;
break;
}
}



}

}