checkbox的全选和反选收藏

<meta charset=gb2312> 



<script language="javascript"> 



function selectAll() 



{ 



for(var i=0;i<document.form1.range.length;i++) 



{ 



document.form1.range[i].checked=true; 



} 



} 



function unSelect() 



{ 



for(var i=0;i<document.form1.range.length;i++) 



{ 



if(document.form1.range[i].checked) 



{ 



document.form1.range[i].checked=false; 



} 



else 



{ 



document.form1.range[i].checked=true; 



} 



} 



} 



</script> 



<form name="form1" id="form1"> 



<input type="checkbox" value="1" name="range">1<br> 



<input type="checkbox" value="2" name="range">2<br> 



<input type="checkbox" value="3" name="range">3<br> 



<input type="checkbox" value="4" name="range">4<br> 



<input type="checkbox" value="5" name="range">5<br> 



<input type="button" value="全选" onclick="selectAll();"> 



<input type="button" value="反选" onclick="unSelect();"> 



</form>