fromCharCode()来加密输入的内容

<input type="text" />
<input type="button" value="加密"/>
<div id="jiami">加密...</div>
<script>
var inlp=document.getElementsByTagName("input");
var jiamiid=document.getElementById("jiami");
inlp[1].onclick=function(){
	var strvalue=" ",str="";
	strvalue=inlp[0].value;
	for(var i=0;i<strvalue.length;i++){
		
		str+=String.fromCharCode(strvalue.charCodeAt(i)-1000);
	};
	jiamiid.innerHTML=str;
};	
</script>