根据一个id返回web页面所有的参数
function getFormQueryString(frmID)

{
var frmID=document.getElementById(frmID);
var i,queryString = "", and = "";

var item; // for each form's object

var itemValue;// store each form object's value



for( i=0;i<frmID.length;i++ )

{

item = frmID[i];// get form's each object



if ( item.name!='' )

{

if ( item.type == 'select-one' )

{

itemValue = item.options[item.selectedIndex].value;

}

else if ( item.type=='checkbox' || item.type=='radio')

{

if ( item.checked == false )

{

continue;

}

itemValue = item.value;

}

else if ( item.type == 'button' || item.type == 'submit' || item.type == 'reset' || item.type == 'image')

{// ignore this type

continue;

}

else

{

itemValue = item.value;

}



itemValue = encodeURIComponent(itemValue);

queryString += and + item.name + '=' + itemValue;

and="&";

}

}



return queryString;

}