js 基本语法

break 应用

<script language="javascript">
<!--
   outerloop:
    for(var i=0;i<10;i++){
      innerloop:
       for(var j=0;j<10;j++){
         if(j>2) break outerloop;
         document.write("i:"+i+"=====j:"+j+"<br/>");
       }
    }

-->
</script>
数组

<script language="javascript">
<!--
 var arr01 = new Array();
 arr01[0] = 3.14;
 arr01[1] = 'js';
 arr01[2] = true;
 arr01[3] = {x:1,y:2};
 var arr02 = new Array(3.14,'js',true,{x:1,y:2});
 
 for(var arr in arr01){
  if(arr == 3 )
  //document.write("键:x====值:"+arr01[arr].x+"<br/>");
  document.write("键:y====值:"+arr01[arr].y+"<br/>");
  else
  document.write("键:"+arr+"====值:"+arr01[arr]+"<br/>");
 }

-->
</script>
声明对象
<script language="javascript">
<!--
//声明一个对象
var img = new Object();
img.width = 120;
img.draw = function (){
  document.write("drawing!<br/>");
}
document.write("图片的宽："+img['width']+"<br/>");
document.write("图片的宽："+img.width+"<br/>");
img.draw();
-->
</script>