if((navigator.appName == "Netscape" && navigator.appVersion.charAt(0) >= 5) || (navigator.appName == "Microsoft Internet Explorer" && navigator.appVersion.charAt(0) >= 4) || (navigator.appName == "Opera" && navigator.appVersion.charAt(0) > 4)) {
document.write("
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document.write("
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document.write("
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document.write("
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document.write("
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document.write("
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document.write("
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document.write("
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document.write("
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document.write("
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document.write("
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document.write("
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document.write("
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document.write("
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document.write("
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document.write("
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document.write("
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document.write("
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document.write("
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document.write("
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document.write("
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document.write("
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document.write("
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document.write("
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document.write("
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document.write("
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document.write("
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document.write("
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}
else {
document.write("browser not compatible with these buttons");
}