【CheckBox】选择或取消所有CheckBox

<SCRIPT LANGUAGE="JavaScript">

<!--

// This script checks and unchecks boxes on a form

// Checks and unchecks unlimited number in the group

// Pass the Checkbox group name

// call buttons as so:

// <input type=button name="CheckAll" value="Check All"

//onClick="checkAll(this)">

// <input type=button name="UnCheckAll" value="Uncheck All"

//onClick="uncheckAll(this)">

// -->

<!-- Begin

function checkAll(theElement) {

var theForm = theElement.form, z = 0;

for(z=0; z<theForm.length;z++){

if(theForm[z].type == 'checkbox'){

theForm[z].checked = true;

}

}

}

function uncheckAll(theElement) {

var theForm = theElement.form, z = 0;

for(z=0; z<theForm.length;z++){

if(theForm[z].type == 'checkbox'){

theForm[z].checked = false;

}

}

}

// End -->

</script>

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