function checkBrowser()
{ 
   this.ver=navigator.appVersion 
   this.dom=document.getElementById?1:0 
   this.ie6=(this.ver.indexOf("MSIE 6")>-1 && this.dom)?1:0; 
   this.ie5=(this.ver.indexOf("MSIE 5")>-1 && this.dom)?1:0; 
   this.ie4=(document.all && !this.dom)?1:0; 
   this.ns5=(this.dom && parseInt(this.ver) >= 5) ?1:0; 
   this.ns4=(document.layers && !this.dom)?1:0; 
   this.mac=(this.ver.indexOf('Mac') > -1) ?1:0; 
   this.ope=(navigator.userAgent.indexOf('Opera')>-1); 
   this.ie=(this.ie6 || this.ie5 || this.ie4) 
   this.ns=(this.ns4 || this.ns5) 
   this.bw=(this.ie6 || this.ie5 || this.ie4 || this.ns5 || this.ns4 || this.mac || this.ope) 
   this.nbw=(!this.bw) 
   return this;
}

//计算内容宽和高

  
  
"txt"</span> height=<span style="COLOR: #ff00ff">"150"</span>>sdf"button" value="计算内容宽度" onClick="test(txt)">  

//无模式的提示框

function modelessAlert(Msg)
{
   window.showModelessDialog("javascript:alert(\""+escape(Msg)+"\");window.close();","","status:no;resizable:no;help:no;dialogHeight:height:30px;dialogHeight:40px;");
}

1.this) onmousemove=MouseMove() onmouseup=MouseUp()>meizz

2.

"myp" src="logo.gif" ondrag="doDrag();" onmouseover="this.style.cursor='hand'" style="position:absolute;left=100;top=100;" onmousedown="doMouseDown();">
"#" onclick="return false">

wlecome

//文档状态改变 

<script> <br><span style="COLOR: #0000ff">var</span> doc=window.frames[<span style="COLOR: #ff00ff">"f"</span>].document; <br><span style="COLOR: #0000ff">function</span> s(){ <br> <span style="COLOR: #0000ff">if</span> (doc.readyState==<span style="COLOR: #ff00ff">"complete"</span>){ <br>  document.all.f.style.height=doc.body.scrollHeight <br>  document.all.f.style.width=doc.body.scrollWidth <br> } <br>} <br>doc.onreadystatechange=s <br></script>