wjzhangq · November 2, 2010 04:12 · Nov 2, 2010
diff --git a/select.js b/select.js
@@ -0,0 +1,44 @@
+  function getRangePos(obj){
+    var Pos = 0; //ie
+    if (document.selection){
+      obj.focus();
+      var Sel = document.selection.createRange();
+      Sel.moveStart('character', -obj.value.length);
+      Pos = Sel.text.length;
+    }else if (obj.selectionStart || obj.selectionStart == '0'){
+      Pos = obj.selectionStart;
+    }
+
+    return Pos;
+  }
+
+  function setRangePos(obj, pos){
+    if (obj.setSelectionRange){
+      obj.focus();
+      obj.setSelectionRange(pos,pos);
+    }else if (obj.createTextRange){
+      var range = obj.createTextRange();
+      range.collapse(true);
+      range.moveEnd('character', pos);
+      range.moveStart('character', pos);
+      range.select();
+    }
+  }
+
+  function get_click(){
+    var obj = document.getElementById('soruce_id');
+    var pos = getRangePos(obj);
+    document.getElementById('info').innerHTML = document.getElementById('info').innerHTML  + 'Pos:' + pos +  '\n';
+    obj.focus();
+  }
+
+  function set_click(){
+    var obj = document.getElementById('soruce_id');
+    var num = document.getElementById('pos_num');
+    var numVal = parseInt(num.value);
+    num.value = numVal;
+    if (numVal > 0){
+      setRangePos(obj, numVal);
+    }
+    obj.focus();
+  }