javascript date.parse

alert("Date: " +Date.parse( "2000-01-01" ))  
// On IE : "Date: NaN" 
//Mozilla:   。               " Date: 946684800000"
 alert("Date: " +Date.parse( "01-01-2000" )) 
 // On IE: "Date: 946656000000"   
// On Mozilla: "Date: NaN"    
 alert("Date: " +Date.parse( "01/01/2000" ))  

// On IE: "Date: 946656000000"   
// On Mozilla: "Date: 946656000000"  

alert("Date: " +Date.parse( "2000/01/01" ))   

// On IE: "Date: 946656000000"   
// On Mozilla: "Date: 946656000000"  
//google           

// "Date: 946656000000"