基本信息

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文档摘要

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JavaScript语法基础;目的;;什么是JavaScript3-2;什么是JavaScript;将JavaScript嵌入网页;使用Script标签;使用外部JS文件;使用外部JS文件;变量;申明变量;申明变量;;;数据类型;HTML

HEAD

SCRIPTLANGUAGE=JavaScript

varx=100;

vary;

varz;

document.write(H2竞拍SONY数码相机600万像素+x+$起价/H2);

y=prompt(加多少银子？,1);

z=x+y;

alert(您最终旳出价\n+z+$);//”\n”用于换行显示

/SCRIPT

/HEAD

body

/body

/HTML;HTML

HEAD

SCRIPTLANGUAGE=JavaScript

varx=100;

vary;

varz;

document.write(H2竞拍SONY数码相机600万像素+x+$起价/H2);

y=prompt(加多少银子？,1);

z=x+parseFloat(y);

alert(您最终旳出价\n+z+$);//”\n”用于换行显示

/SCRIPT

/HEAD

body

/body

/HTML;运算符;运算符;算术运算符-1;HEAD

SCRIPTlanguage=JavaScript

functioncalcu()

{

varnumb1=document.calc.num1.value;

varnumb2=document.calc.num2.value;

vartotal=parseFloat(numb1)*parseFloat(numb2);

document.calc.result.value=total;

}

/SCRIPT

/HEAD;比较运算符;HTML

HEAD

SCRIPTLANGUAGE=JavaScript

functioncalcu()

{

varnumb1=document.calc.num1.value;

varnumb2=document.calc.num2.value;

vartotal=parseFloat(numb1)*parseFloat(numb2);

document.calc.result.value=total;

if(total500)

alert(购置总价超出500\n支付时将赠予超级Q币2枚！);

}

/SCRIPT

/HEAD

….其他代码略，同上例;运算符;HEAD

SCRIPTLANGUAGE=JavaScript

functioncalcu()

{

varnumb1=document.calc.num1.value;

varnumb2=document.calc.num2.value;

vartotal=parseFloat(numb1)*parseFloat(numb2);

document.calc.result.value=total;

if((total500)(total=1000))

alert(购置总价超出500\n支付时将赠予超级Q币2枚！);

if((total1000)(total=2023))

alert(购置总价超出1000\n支付时将赠予IBM光电智能鼠标1只！);

if((total2023))

alert(购置总价超出2023\n请直接与来宾台联络！);

}

/SCRIPT

/HEAD….其他代码略，同上例;;HEAD

SCRIPTLANGUAGE=JavaScript

functioncalcu()

{

varnumb1=document.calc.num1.value;

varnumb2=document.calc.num2.value;

if((numb1!=)(numb2!=))

{

vartotal=parseFloat(numb1)*parseFloat(numb2);

document.calc.result.value=total;

if((total500)(total=1000))

alert(购置总价超出500\n支付时将赠予超级Q币2枚！);

if((total1000)(total=2023))

alert(购置总价超出1000\n支付时将赠予IBM光电智能鼠标1只！);

if((total2023))

alert(购置总价超出2023\n请直接与来宾台联络！);

}

}

/SCRIPT

/HEAD….其他代码略，同上例;ifelse