detect IE7 with JavaScript

<script type=”text/javascript”>
if (window.XMLHttpRequest) {
//IE 7, mozilla, safari, opera 9
} else {
// IE6, older browsers
}
</script>

<script type=”text/javascript”>
if (typeof document.body.style.maxHeight != “undefined”) {
// IE 7, mozilla, safari, opera 9
}
else {
// IE6, older browsers
}
</script>

<script type=”text/javascript”>
isIE7 = false;
/* @cc_on
@if (@_jscript_version &;gt;= 5.7)
isIE7 = true;
@end
@*/
</script>

<script type=”text/javascript”>
if((document.all)&&(navigator.appVersion.indexOf(”MSIE 7.”)!=-1)){
document.write(”IE 7 “);
}
</script>

source

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