1 function toggle_display (block) {
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2 var w = document.getElementById (block);
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3 var t = document.getElementById (block + ":toggle");
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4 if (w.style.display == "none") {
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5 w.style.display = "block";
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6 t.getElementsByTagName("img")[0].setAttribute ("src", "xtree/images/clean/Lminus.gif"); // <img src="xtree/images/clean/Lminus.gif">
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8 w.style.display = "none";
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9 t.getElementsByTagName("img")[0].setAttribute ("src", "xtree/images/clean/Lplus.gif"); // <img src="xtree/images/clean/Lplus.gif">
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