<script type="text/javascript">
var myarr1= new Array("86","010")
var myarr2= new Array("84697581");
var myarr3= myarr1.concat(myarr2);
document.write(myarr3.join("-"))
</script>
var myarr1= new Array("86","010")
var myarr2= new Array("84697581");
var myarr3= myarr1.concat(myarr2);
document.write(myarr3.join("-"))
</script>
2015-05-13
<script type="text/javascript">
var myarr1= new Array("010")
var myarr2= new Array("-","84697581");
document.write(myarr1.concat(myarr2));
</script>
var myarr1= new Array("010")
var myarr2= new Array("-","84697581");
document.write(myarr1.concat(myarr2));
</script>
2015-05-13
<script type="text/javascript">
var mymath=Math.random()*10;
document.write(Math.round(mymath))
</script>
var mymath=Math.random()*10;
document.write(Math.round(mymath))
</script>
2015-05-13
<script type="text/javascript">
document.write(Math.round(3.3)+"<br/>");
document.write(Math.round(-0.1)+"<br/>");
document.write(Math.round(-9.9)+"<br/>");
document.write(Math.round(8.9))
</script>
document.write(Math.round(3.3)+"<br/>");
document.write(Math.round(-0.1)+"<br/>");
document.write(Math.round(-9.9)+"<br/>");
document.write(Math.round(8.9))
</script>
2015-05-13
这一遍：
// 任务1 for(var i=0;i<hobby.length;i++) { if(hobby[i].type=="checkbox") { hobby[i].checked = true;} }
// 任务2 for(var i = 0;i<hobby.length;i++) { hobby[i].checked = false; }
// 任务3 var m= document.getElementById("hobby" + j); m.checked = true;
// 任务1 for(var i=0;i<hobby.length;i++) { if(hobby[i].type=="checkbox") { hobby[i].checked = true;} }
// 任务2 for(var i = 0;i<hobby.length;i++) { hobby[i].checked = false; }
// 任务3 var m= document.getElementById("hobby" + j); m.checked = true;
// 任务1 for(var i=0;i<hobby.length-2;i++) { if(hobby[i].type=="checkbox") { hobby[i].checked = true;} }
// 任务2 for(var i = 0;i<hobby.length;i++) { hobby[i].checked = false; }
// 任务3 var m= document.getElementById("hobby" + j); m.checked = true;
// 任务2 for(var i = 0;i<hobby.length;i++) { hobby[i].checked = false; }
// 任务3 var m= document.getElementById("hobby" + j); m.checked = true;
// 任务1 for(var i=0;i<hobby.length-2;i++) { hobby[i].checked = true;}
// 任务2 for(var i = 0;i<hobby.length;i++) { hobby[i].checked = false; }
// 任务3 var m= document.getElementById("hobby" + j); m.checked = true;
// 任务2 for(var i = 0;i<hobby.length;i++) { hobby[i].checked = false; }
// 任务3 var m= document.getElementById("hobby" + j); m.checked = true;