is there diffrent where the javacript

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there we use the javascript ,we can place the javascript code in the head tag, like <head><code is here> </head> or in the body tag,like <body><code is here></body> and can put it behind the </html> ,like </html><code is here> , and now is there have the diffrence of this?:confused:

and when we use this javascript,in the page , load page first time,is this javascript will excute (don't use the onload event)

How can i do?

Posted 7-Aug-10 22:18pm

lovejun

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AspDotNetDev · Accepted Answer · 2010-08-07T22:51:00

Solution 1

Not sure if it's technically valid, but it works for me in IE8:

HTML

<html>
<body>
	This is the body.
</body>
</html>
<script type="text/javascript">
	alert("hello");
</script>

Posted 7-Aug-10 22:51pm

AspDotNetDev

Updated 7-Aug-10 22:52pm

v2

Comments

AspDotNetDev 8-Aug-10 4:52am

Also, the "difference" between placing this script here and placing it somewhere else is that it will execute at a later time.

lovejun 8-Aug-10 9:35am

thanks,this can be test in my local pc~

lovejun 8-Aug-10 9:35am

Reason for my vote of 5
give me a solotion

Sandeep Mewara · Accepted Answer · 2010-08-08T01:58:00

Your last part is not clear at all. About the previous part:
You can put the JavaScript code anywhere in the page, generally before html tag starts or after html tag ends.
Now the difference lies while loading -
1. If you don't use any script that is related to page load then you can put it at the end after html tag. This will render the page first and then load the javascript. So, a UI performance is increased.
2. If you put the Javascript just before HTML tag then they will first be downloaded and then the UI will be rendered.

It's all about what you need to be executed/downloaded/rendered first. If you have a onload javascript event of the page then you should put the JS before HTML tag to have a smooth execution.