//checkbox选中
function checkAll(form, objName)
{
	for (var i = 0; i < form.elements.length; i++)
	{
		var e = form.elements[i];
	    if (e.name == objName && e.disabled == false)
			e.checked = form.chkAll.checked;
	}
}

//checkbox是否被选中
function isChecked(objName)
{
	var names = document.getElementsByName(objName);
	//alert(names.length);
	var b = false;
	for(var i = 0; i < names.length; i++) {
		if(names[i].checked) {
			b = true;
			break;
		}
	}
	return b;
}

//得到复选框的值
function getCheckValue(cbName){
	var cbValues = "";
	var cbObj = document.all(cbName);
	if(cbObj.length>0){
		for(var i=0;i<cbObj.length;i++){
			if(cbObj[i].checked){
				cbValues = cbValues +  cbObj[i].value + "|";
			}
		}
		
	}else{
		if(cbObj.checked){
			cbValues = cbObj.value
		}
	}
	return cbValues;
}