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<script Language="JavaScript">
 document.write("<br>»á¼Ó´ÖµÄ×ÖÌå</br>");
</script>
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<script Language="JavaScript">
 var greeting;
 greeting = "welcome to the js";
</script>
<script Language="JavaScript">
 document.write(greeting);
</script>
 
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<script Language="JavaScript">
 var arr = new Array(3);
 arr[0] = 1;
 arr[1] = 2;
 arr[2] = 3;
 arr[3] = 4;//¿ÉÒÔ·ÃÎʵ½µÚËĸöÔªËØ
</script>
<script Language="JavaScript">
   document.write(arr[3]);
</script>
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<script Language="JavaScript">
 var result1,result2,result3;
 result1 = true && false;
 result2 = true || false;
 result3 = !true;
</script>
<script Language="JavaScript">
   document.write(result1 + "<br>");
 document.write(result2 + "<br>");
 document.write(result3);
</script>
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<script Language="JavaScript">
 var h ="hello";
 var g = "world";
</script>
<script Language="JavaScript">
   document.write(h + g);
 
</script>
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<script Language="JavaScript">
 var h ="welcome to the JS";
 
</script>
<script Language="JavaScript">
   document.write(h.substring(3,9));//´òÓ¡³öÀ´µÄÊÇcome t
 
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